Messages in this thread | | | From | Pavel Begunkov <> | Subject | Re: INFO: task hung in io_uring_flush | Date | Mon, 10 Aug 2020 19:08:23 +0300 |
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On 10/08/2020 19:04, syzbot wrote: > syzbot has bisected this issue to: > > commit f86cd20c9454847a524ddbdcdec32c0380ed7c9b > Author: Jens Axboe <axboe@kernel.dk> > Date: Wed Jan 29 20:46:44 2020 +0000 > > io_uring: fix linked command file table usage
There are several known problems with io_uring_cancel_files() including races and hangs. I had some drafts and going to patch it in a week or so.
> > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16db4d3a900000 > start commit: 9420f1ce Merge tag 'pinctrl-v5.9-1' of git://git.kernel.or.. > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=15db4d3a900000 > console output: https://syzkaller.appspot.com/x/log.txt?x=11db4d3a900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=72cf85e4237850c8 > dashboard link: https://syzkaller.appspot.com/bug?extid=6338dcebf269a590b668 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=141dde52900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15b196aa900000 > > Reported-by: syzbot+6338dcebf269a590b668@syzkaller.appspotmail.com > Fixes: f86cd20c9454 ("io_uring: fix linked command file table usage") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection >
-- Pavel Begunkov
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